Document DDEKDR4xOX1mVoqmX4eDR4k3n

*? L-'K'-M. '-i -' ' - ' .. i; ; '-v" . "' / I ] American Society of Heating and Ventilating Engineers Guide 1931 An Instrument of Service prepared for the Profession-- and Containing reference data on the design and SPECIFICATION OF HEATING AND VENTILATING SYSTEMS----- Based on the Transactions--the Investigations of the Research Laboratory--and the Practice of the Members and Friends of the Society together with a Manufacturers' Catalog Data Section Containing Essential and Reliable In^ormation Concerninc Modern j;* jHt ? Equipment' ; ` The Roll of Membership of the Society with Complete Indexes to Technical and Catalog Data Vol. 9 $5.00 Per Copy Published Annually by American Society of Heating and Ventilating Engineers 51 Madison Avenue New York: 1039165